A small rodent quadruped of the Hare family, living chiefly in large colonies called warrens, in burrows dug deep into the ground. They are not much seen during the day, but come out at night to eat, and they often do great damage by gnawing the bark off young trees and by spoiling growing crops. Rabbits are remarkably prolific, and have become pests in some parts of Australia and New Zealand. The common European species, which is often kept as a pet, has been introduced into many countries.